Quest. Why now, and not when he came down from God before? Answ.
1. Because now he obtained what he did not before, to wit, a glimpse of the Divine glory, which, though but very transient, left its print upon his face.
2. Now it was more necessary than before, to procure the greater honour to Moses, and to the law, 2 Corinthians 3:7,8,11, because of the late horrid Violation and contempt of them, which the Israelites had fallen into.